Method of correcting false-color pixel in digital image

1. A method of correcting a false-color pixel in a digital image, for correcting a false-color pixel generated after being processed by a color correction matrix (CCM), comprising:

obtaining a raw image (img1), for being processed by a color correction process through a CCM, so as to generate a processed image (img2), wherein during the color correction process, a value m corresponding to the raw image and a value n corresponding to the processed image are looked up through a look-up table according to a color difference ratio between pixels of the raw image and that of the processed image;

comparing the pixels of the raw image with that of the processed image according to a color difference ratio, to find out a false-color pixel in the pixels of the processed image; and

performing a color correction on the false-color pixel at the corresponding position of the raw image and the processed image according to an equation as follows:

Pixel img3 =m *Pixel img1 +n *Pixel img2,

wherein Pixel img1 is a pixel of the raw image, Pixel img2 is a pixel of the processed image, Pixel img3 is an output pixel, and m+n=1, m≧0, n≧0.

2. The method of correcting a false-color pixel in a digital image as claimed in claim 1 , wherein the CCM is a 3*3 pixel matrix, and a pixel matrix with a corresponding size is selected from the raw image to perform the color correction with the CCM.

3. The method of correcting a false-color pixel in a digital image as claimed in claim 1 , wherein the CCM is a 4*3 pixel matrix, and a pixel matrix with a corresponding size is selected from the raw image to perform the color correction with the CCM.

4. The method of correcting a false-color pixel in a digital image as claimed in claim 1 , wherein the step of generating the processed image further comprises:

respectively selecting pixel matrixes with the corresponding size from the raw image non-overlappingly to perform the CCM operation.

5. The method of correcting a false-color pixel in a digital image as claimed in claim 1 , wherein a color difference between the raw image and the processed image is determined according to a RGB color field.

6. The method of correcting a false-color pixel in a digital image as claimed in claim 5 , wherein the step of executing the color correction further comprises:

making the pixels of the processed image generate a corresponding red pixel, a corresponding green pixel, and a corresponding blue pixel;

performing the color correction on the red pixel;

performing the color correction on the green pixel; and

performing the color correction on the blue pixel.

7. The method of correcting a false-color pixel in a digital image as claimed in claim 1 , wherein a color difference between the raw image and the processed image is determined according to a YCbCr color field.

8. The method of correcting a false-color pixel in a digital image as claimed in claim 7 , wherein the step of executing the color correction further comprises:

making the pixels of the processed image generate a corresponding brightness component, a corresponding blue chromaticity component, and a corresponding red chromaticity component;

performing the color correction on the brightness component;

performing the color correction on the blue chromaticity component; and

performing the color correction on the red chromaticity component.